1. Department of Medicine, University of North Carolina, Chapel Hill, NC
2. Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, AL
3. Division of Hematology-Oncology, Department of Pediatrics, Institute for Cancer Outcomes and Survivorship, University of Alabama at Birmingham, Birmingham, AL
4. Division of Women's Reproductive Health, Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, AL